Question

Which of the following solutions would have the highest pH? Assume that they are all 0.10 M in acid at 25 C. The acid is followed by its Ka value. HC102, 1.1 x 10-2 OHCHO2, 1.8 x 10-4 HC6H50, 1.3 * 10-10 O HNO2, 4.6 x 10-4 O HOCI, 2.9 x 10-8

Answer 1

Consider, a general reaction HA + H₂O (1) - Hot + A quid. Conjugate beose ka? [4₂ 0 + ] {A- - CHA ka is the dissociation constant or and ionization. Constant. The value of ka tells the extent of dud dissociation. If the value of ka is large. means and has been dissociated in large extent. - and giving H3ot to the solution. And making the pH small. Large ka = more audic = less pH. Small ka value = less acidic = more pH Less So, 11CG Hso has small ka vale among all id 1.3x10-10 So with and dissociation is very small. Ha Ht are going into the solution, and making the solution very less audic so pH will be righe pH = -leg CH₂o t] High (43 ot] =) Audic pH = Low ph. Low [H₂o+] - Basic pH = High pH so option e is worect. Hoo + HC HOA Z Hoot + C6H5or kan 1038 10-16 no = [H₂ot] [2LH50) (HCC Hso